.. and complex sleeves. The neckline and sleeve combination gave a horizontal “winged” appearance which was meant to make the neck look slender and long and expose “creamy breasts” of the ideal woman.
(Portrait estimated 1840, the wife of the Hungarian ambassador to England looks like she has a long neck, but you can tell she’s not comfortable with so much skin exposed as she has completely covered it with a thick necklace. Not everyone in the Early Victorian era wanted to show everything, but they did like to be considered fashionable, as fashion was a symbol of status)